中国物理B ›› 2019, Vol. 28 ›› Issue (7): 76109-076109.doi: 10.1088/1674-1056/28/7/076109

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Isostructural phase transition-induced bulk modulus multiplication in dopant-stabilized ZrO2 solid solution

Min Wang(王敏), Wen-Shu Shen(沈文舒), Xiao-Dong Li(李晓东), Yan-Chun Li(李延春), Guo-Zhao Zhang(张国召), Cai-Long Liu(刘才龙), Lin Zhao(赵琳), Shu-Peng Lv(吕舒鹏), Chun-Xiao Gao(高春晓), Yong-Hao Han(韩永昊)   

  1. 1 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
    2 Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2019-01-31 修回日期:2019-05-14 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Yong-Hao Han E-mail:hanyh@jlu.edu.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFA0305900) and the National Natural Science Foundation of China (Grant Nos. 11774126, 11774174, 1674404, and 51772125).

Isostructural phase transition-induced bulk modulus multiplication in dopant-stabilized ZrO2 solid solution

Min Wang(王敏)1, Wen-Shu Shen(沈文舒)1, Xiao-Dong Li(李晓东)2, Yan-Chun Li(李延春)2, Guo-Zhao Zhang(张国召)1, Cai-Long Liu(刘才龙)1, Lin Zhao(赵琳)1, Shu-Peng Lv(吕舒鹏)1, Chun-Xiao Gao(高春晓)1, Yong-Hao Han(韩永昊)1   

  1. 1 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
    2 Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-01-31 Revised:2019-05-14 Online:2019-07-05 Published:2019-07-05
  • Contact: Yong-Hao Han E-mail:hanyh@jlu.edu.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFA0305900) and the National Natural Science Foundation of China (Grant Nos. 11774126, 11774174, 1674404, and 51772125).

摘要:

The electrical transport properties and structures of Y2O3/ZrO2 solid solution have been studied under high pressure up to 23.2 GPa by means of in situ impedance spectroscopy and x-ray diffraction (XRD) measurements. In the impedance spectra, it can be found that the pressure-dependent resistance of Y2O3/ZrO2 presents two different change trends before and after 13.3 GPa, but the crystal symmetry still remains stable in the cubic structure revealed by the XRD measurement and Rietveld refinement. The pressure dependence of the lattice constant and unit cell volume shows that the Y2O3/ZrO2 solid solution undergoes an isostructural phase transition at 13.1 GPa, which is responsible for the abnormal change in resistance. By fitting the volume data with the Birch–Murnaghan equation of state, we found that the bulk modulus B0 of the Y2O3/ZrO2 solid solution increases by 131.9% from 125.2 GPa to 290.3 GPa due to the pressure-induced isostructural phase transition.

关键词: high pressure, x-ray diffraction, crystal structure, Y2O3/ZrO2

Abstract:

The electrical transport properties and structures of Y2O3/ZrO2 solid solution have been studied under high pressure up to 23.2 GPa by means of in situ impedance spectroscopy and x-ray diffraction (XRD) measurements. In the impedance spectra, it can be found that the pressure-dependent resistance of Y2O3/ZrO2 presents two different change trends before and after 13.3 GPa, but the crystal symmetry still remains stable in the cubic structure revealed by the XRD measurement and Rietveld refinement. The pressure dependence of the lattice constant and unit cell volume shows that the Y2O3/ZrO2 solid solution undergoes an isostructural phase transition at 13.1 GPa, which is responsible for the abnormal change in resistance. By fitting the volume data with the Birch–Murnaghan equation of state, we found that the bulk modulus B0 of the Y2O3/ZrO2 solid solution increases by 131.9% from 125.2 GPa to 290.3 GPa due to the pressure-induced isostructural phase transition.

Key words: high pressure, x-ray diffraction, crystal structure, Y2O3/ZrO2

中图分类号:  (X-ray diffraction)

  • 61.05.cp
61.50.-f (Structure of bulk crystals) 91.60.Gf (High-pressure behavior)